The world in which we find ourselves today is no longer governable entirely by resort to the classical system of international law. Even more seriously, it would seem that the purposes and principles of the United Nations Charter are no longer being served sufficiently in light of new concerns. The text adopted in 1945 does not convey the image of a world tormented by terrorists. Nor does it reflect the most pressing commitments of our time: to democratic governance, to environmental responsibility, and to a freer and more equitable system of world trade. Increasingly, the international law...